Heat-treating furnace



C. J. KIRK.

HEAT TREATING FURNACE.

APPLICATION FILED MAR. I, 1919.

Patented Mar. 2, 192`.

ILEEI EEB? NNI.

IIIIIIWJI I IIIIII III. -IIII [I+ Il II Jlwu ,Be it known tha .1, om

which the objects `to be heate jected directlyto the hot products ofcom- .l i n v y 17 and 18 uponwhichthecars `19 and 20 UNITED sTATEsPATENT :QFFICE- z CHARLES J. yman, or NEW cas'rnn,k Pannen-.vanta #l yTo all lwhom zt may concern.- J. Kimi, a citizen` of the United States,a resident of New Castle, in the county of Lawrence and State ofPennsylvania, have invented `a new and useful Improvement inHeat-Treating Furnaces; and I do hereby declare the` followin to be afull, clear, and exact description t ereo-f.

My invention' relates' to` a heatftreatiiigjv furnace.y

to that class: of heat treatin are not subbustion, but are sub'ect tothe indirect action of the heat, suc as in the burning of pottery and inthe annealing of metal. .fA

The object `of my inventionv is to provide A a compact form of furnaceof this character in Whlch the objects to be treated may be movedcontinuously through the furnace on a double line of tracks. Thel cars`on one track entering in' the op osite direction lill from the other,provision ing made for utilizing the heat emanating from the heated carsand the objects on one track for aiding in heating the objects enteringthe ,furl nace from the opposite end on the other track, therebyconservin the heat and reducing the'time require for treatment as wellas the fuel consumed.

To these ends my invention comprises the -novel features hereinafter setforth and claimed.

In the accompanying drawing Figure 1 is a plan view partl in section ofmy improved furnace; ig. 2 is a longitudinal section, and Fig. 3 is anenlarged crosssection on the line 3 3 Fig. 1.

In the drawing the numeral 2 designates a suitable base or foundationupon which the furnace is erected, said furnace consisting of the sidewalls 3 and the top or crown 4.

The heating chamber 5' is divided into two compartments by the artitionwall 6, which also aids to strengt en and support the roof 4. Thisartition wall 6 is provided with the openings 7 arran ed at intervals atthe top and bottom an preferably staggered with relation to each other.

Suitable combustion chambers 8 and9 are provided atv each side of thefurnace for sup lying the heat whether gaseous or solid fue is employed.These furnaces may be top o Specicationof Letters Patent. Mal". 2, 1920.i Application mea luren 1,1919. ysmal no. asuman. l

of any suitableconstruction and'Iihavey only illustrated them inva.diagranimatic', form in Fi.1.j n oinmunieatin'g with the'. combustionchambers 8 andlarethe fines 10 and 11 reslpectively in thesidewallsofthe furnace. Ahe ues 10 ,communicate with each other throu h kthe'lfiue12 which passes over the the furnace chamber 5, and Ithe iiues y11communicate through a like iiue 13.

,\ yThese fines 10 and 1 1 are non-communicative, being separated `fromeach other by the wall 14. v Outlet fiuesl andl are provided for thefines 10 and l11 respectively. Y* Within the heating chamber are thetracks travel respectively, said cars being made up in passing throughYthe. furnace. ,y The objects `21 to ,be treated are arranged upon saidcars yso asto allowthe. heatto circulate in and` around-the same `duringtheir passage through the furnace. f

The ends of the furnace are provided with suitable doors 22. i

In the operation of the furnace the ware mounted on the cars 19 isintroduced into the furnace at one end and the ware mounted on the cars2O is introduced on the opposite track at the other end of the furnace.The heat from the combustion chambers 8 and 9 passes through the flues-10 and 11 and also by the flues 12 and 13 to the flues at theoppositeside. The cars and the ware as they pass through the heating chamber areheated to a vhigh temperature, getting hotter as they' near thedischarge en Accordingly the heat given of by said highly heated cars'and the objects carried thereon will pass through the openings 7 in thepartition 6, and said heat is emplo ed for assisting in the heating ofthe co d cars which are coming in on the next track in( the nextcompartment of the heatin chamber. These cold cars being cooler c illthe air and it drops to thebottom openings in partition wall 6, andpasses up through the heated cars on the opposite track and being heatedthereby ascends and escapes through the upper openings 7, therebycreating a circulation as indicated by the arrows.

In this'manner I make use of the heat given off by the out oin carsl toheat the incomingcars, and t ere y create a saving and a consequentreductlon in the amount of heating chamber, a longitudinal fuel.Furthermore by this construction the length of the furnace may bereduced as the heating is accomplished in a shorter space of time andconsequently such a long furnace is not required. It will, of course, beunderstood that as one car passes out at the discharge end a new car isadmitted to the receiving end, so that the process is a continuous one,and it is not necessary to allow the furnace to cooldown for chargingand re-charging.

What I claim is: l

1. In a heat-treating furnace having a artition wall having opemngstherein divi ing said chamber into two communicating com artments,heating ues formed in the wal s of said furnace, one set of ues for onesection of the furnace and the other set for the other section, saidsets of ues being non-communicating,v and means for supplying heat tosaid iiues.

2. In a heat-treating furnace, having ai heating chamber, a longitudinalartition wall having ognings therein divi 'ng said heating cham r intotwo communicating compartments, heating flues formed in the side wallsof said` furnace, one set of flues for one section of the furnace and alike set of iues for the other section of the furnace, said sets offiues being non-communieating, cross-over flues connecting said dues,and means for supplying heat to said ues.

4. In a heat-treating furnace,V having aV heatin chamber, a lon ltudinalpartition wall lviding said cham er into two compartments, and saidpartition having openings at its upper and lower portions, where- 'bythe heat emanating from the heated bodies introduced at one endofsaid'lfurnaceinto one compartment rises and passes through said upperopenings into the other.

compartment [while the air chilled by the cooler bodies introduced atthe other end. of said furnace in said other compartment descends andpasses through said lower openings back. into the first namedcompartment creating a circulation.

In testimony whereof I the said CHARLES J. KIRK have hereunto set myhand.

CHARLES J. KIRK.

Witnesses:

H. L. Femme, O. P. BEE.

